At a time when existing LEDs are helping to keep electricity bills low, a group of scientists has developed a more efficient and low-cost alternative to the materials used in traditional LEDs.
Princeton engineering researchers refined the manufacturing of light sources made with crystalline substances known as perovskites that provide more efficiency, lower-cost and long life to the new LEDs.
In this technique, nanoscale perovskite particles self-assemble to produce more efficient, stable and durable perovskite-based LEDs and the working was published in journal Nature Photonics.
"Our new technique allows these nanoparticles to self-assemble to create ultra-fine grained films, an advance in fabrication that makes perovskite LEDs look more like a viable alternative to existing technologies," said lead researcher Barry Rand.
Rand's team and others researchers are exploring perovskites as a potential lower-cost alternative to gallium nitride (GaN) and other materials used in LED manufacturing. Lower-cost LEDs would speed the acceptance of the bulbs, reducing energy use and environmental impacts.
Perovskite is a mineral originally discovered in the mid-1800s in Russia and named in honour of the Russian mineralogist Lev Perovski.